美国国家航空航天局NASA每日一图-2017年6月22日

The White Cliffs of 'Rover'

This image was acquired by the High Resolution Imaging Science Experiment (HiRISE) camera aboard NASA's Mars Reconnaissance Orbiter on April 18, 2017, at 14:04 local Mars time. It reminded the HiRISE team of the rugged and open terrain of a stark shore-line, perhaps of the British Isles. A close-up in enhanced color produces a striking effect, giving the impression of a cloud-covered cliff edge with foamy waves crashing against it.

The reality is that the surface of Mars is much dryer than our imaginations might want to suggest. This is only a tiny part of a much larger structure; an inverted crater—a crater that has been infilled by material that is more resistant to erosion than the rocks around it—surrounded by bluish basaltic dunes. The edge of these elevated light-toned deposits are degraded, irregular and cliff-forming.

Dunes visible below the cliff, give the impression of an ocean surface, complete with foam capped waves crashing against the “shore line,” demonstrating the abstract similarity between the nature of a turbulent ocean and a Martian dune field.

Meridiani Planum has an overall smooth terrain, which starkly contrasts with the more common boulder- and crater-laden landscapes observed over much of the rest of Mars. This makes it relatively younger in character than many other areas of the planet. Meridiani is one of the Mars Exploration Rover landing sites, and, is known for its layers and sediments. The orbital detection of hematite was one of the main reasons for sending Opportunity to this area.

Salt-bearing rocks—also called sulphates—were observed in the very first image from Opportunity, so perhaps it’s apt that this HiRISE image reminds us of the turmoil and rugged beauty of a cliff-face, a coastline, being worn down by a relentless sea.

More information and image products: HiRISE website

NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.

Image Credit: NASA/JPL/University of Arizona
Caption: Jon Kissi, Livio L. Tornabene, Zach Morse, Eric Pilles and Gavin Tolometti

Last Updated: June 22, 2017
Editor: Sarah Loff

“流浪者”的白色悬崖

这幅图像是由2017年4月18日14时04分14时04分的NASA火星侦察轨道器上的高分辨率成像科学实验(HiRISE)摄像机获得的。它提醒了HiRISE团队中一条崎岖不平的海岸线,也许是不列颠群岛的开阔地形。增强颜色的特写产生了惊人的效果,给人一种覆盖着云层的悬崖边缘的印象,并带有泡沫般的波浪。

现实是,火星的表面比我们的想象可能想要的要好很多。这只是一个更大的结构的一小部分;一个倒立的火山口 - 一个由比其周围的岩石更耐腐蚀的材料填充的火山口,被蓝色的玄武岩沙丘包围。这些升高的轻质沉积物的边缘退化,不规则和悬垂形成。

在悬崖之下可以看到沙丘,给人一种海洋表面的印象,其中充满了泡沫的海浪冲击“岸线”,表明了一个动荡的海洋的性质与火星沙丘之间的抽象相似性。

Meridiani Planum具有整体平滑的地形,与在火星其余部分观察到的更常见的巨石和火山口的景观形成鲜明对比。这使得它比地球上许多其他地区的性格相对年轻。 Meridiani是火星探测者着陆点之一,以层和沉积物而闻名。赤铁矿的轨道检测是将机会送到这一领域的主要原因之一。

在机会的第一张图像中观察到含盐岩 - 也称为硫酸盐岩,所以也许这个HiRISE图像可以让我们看到悬崖面,海岸线的动荡和崎岖的美丽被一个无情的海。

更多信息和图像产品:HiRISE网站

美国航空航天局喷气推进实验室是加利福尼亚州帕萨迪纳分校的一个部门,管理美国宇航局科学任务总监华盛顿的火星探测轨道仪。 HiRISE相机由Ball Aerospace and Technology Corporation建造,由亚利桑那大学经营。

图片来源:美国航空航天局/ JPL /亚利桑那大学
图片说明:Jon Kissi,Livio L. Tornabene,Zach Morse,Eric Pilles和Gavin Tolometti

最后更新:2017年6月22日
编辑:莎拉·洛夫

 

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